Cochlea (gray) of a Mongolian gerbil with optical cochlea implant. Its LEDs (green) are oriented towards the Rosenthal canal (dark blue), which houses the cell bodies of spral ganglion neurons, whose processes collectively form the auditory nerve. The illustration shows the nerve signals to stimulation with the LEDs. The different colors in the Rosenthal canal illustrate the spatial distribution and intensity of the generated nerve signal. (niels albrecht/institute for auditory neuroscience)

For an improved listening experience – optical cochlear implants generate more precise nerve signals than electrical models

Posted on 05.11.2026

-esearchers at the University Medical Center Göttingen (UMG) have demonstrated in an animal model that optical cochlear implants generate nerve signals that are more easily distinguishable than those produced by conventional electrical implants. Nerve signals transmit auditory information — such as sound waves, pitch, and volume — to the brain, enabling a comprehensive hearing experience. In total, up to ten different light-emitting diodes (LEDs) were able to specifically trigger different nerve signals using very low levels of light energy. This underscores the potential of optical cochlear implants for improved hearing restoration. The results have been published in the journal “EMBO Molecular Medicine.”

Link to the UMG press release
Link to the EMBO Molecular Medicine article